Duckworth, V., & Tummons, J. (2010). Contemporary issues in lifelong learning. McGraw-Hill : Open University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDuckworth, Vicky, और Jonathan Tummons. Contemporary Issues in Lifelong Learning. Berkshire, England: McGraw-Hill : Open University Press, 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDuckworth, Vicky, और Jonathan Tummons. Contemporary Issues in Lifelong Learning. McGraw-Hill : Open University Press, 2010.
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